Improvement in dies for cutting sheet metal for pipe-elbows



S.G. WARNER.

013s FOR CUTTING SHEET-METAL FOR. PIPE ELBOWS. No. 18Z 7Z8. PatentedSept.'26,1876.

UivrrED STATES PATENT OFFICE.

- SAMUEL Gr. WARNER, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN DIES FOR CUTTING SHEET METAL FOR PIPE-IELBOWS.

Specification forming part of Letters Patent No. 182,728, datedSeptember 26, 1876; application filed March 8, 1876.

To all whom it may concern:

. Be it known that I, SAMUEL G. WARNER, of the city of Brooklyn, countyof Kings and State of New York, have invented a certain new and usefulImprovement in Dies for Outting Sheet-Metal Blanks for Forming CurvedElbowJoints for Stove and other Sheet-Metal Pipes, of which thefollowing is a full description, reference being had to the accompanyingdrawing, which forms a part of this specification.

The object of my invention is' to simplify the cutting of sheetmetalblanks for forming curved elbowjoints for sheet-metal pipes used forstoves and other purposes, and to reduce the cost of dies for cuttingthe same.

As these sheet-metal blanks have hitherto been made, the use of two ormore dies was necessary to form a sufficient number of blanks to make acomplete curved elbow. I propose by the use of one complete die,composed of two parts, to out these metal blanks, each part of the diehaving but one cutting side.

In the drawing, Figure 1 represents my improved die, composed of the twoparts a and b, for cutting the blank to form the curved elbow. Fig. 2 isa sectional view of the die, showing the die in position to cut blanks.Fig. 3 represents the sheet of metal from which the blanks d e f g h arecut for forming the curved elbow when out at the lines 0 c c c. Fig. 4represents the sheet-metal blanks put together to form the curved elbow.

In Figs. 1 and. 2, A represents the base of the die, and B the cuttingportion of the same, or these can be reversed, using A for the cuttingportion of the die and Bfor the face of the die, as preferred. This diecan be connected with and worked by any suitable machinery adapted forthe purpose.

To cut sheet-metal blanks for curved elbowjoints for pipes by the use ofmy improved die, I proceed as follows: I take the sheet of metal, asrepresented in Fig. 3, and by the use of my improved die, having the twoparts or faces A and B, as shown in Figs. 1 and 2, out therefrom theblank d. This leaves the impinging side of the blanks e of theconformation desired in the complete blank 0. By merely reversing thesheet of metal shown in Fig. 3, and subjecting the same to the action ofmy said improved die, the complete blanks d, c,f, g, and h are cut, andare ready to be put together to form the curved elbow shown in Fig. 4.

It will thus be seen that by the use of my improved dieI cut a blank ateach blow, and at the same time leave the edge of the sheet of metal ofsuch a shape as to form a side of the next adjacent blank. By the use of'no other dies than mine, as above described, can sheet-metal blanks forforming a curved elbow be formed without a waste of metal between theblanks, as those now in use out each blank separate and distinct,leaving a wastage of metal between, while my improved die, intcuttingone blank, also forms a portion of the contour of the next adjacent one,by which means the waste of metal is avoided.

I do not claim either a curved elbow for pipes or blanks for forming thesame; but

What I claim as my invention is- A single die composed of two parts, aand I), having corresponding curved cutting-edges, substantially asshown and described, whereby all of the blanks necessary to form thecurved elbows of stove-pipes and similar articles may be cut from thesheet of metal without waste by a single set of dies, each stroke of themoving portion of the die cutting out one blank, and at the same timeforming one side of another, as set forth.

SAML. G. WARNER.

Witnesses:

CHARLES G. 00E, LOUIS W. Faoscr.

